Apparatus for applying felts to glass polishing blocks



A. E. 'EVANS 1,818,975

APPARATUS FOR APPLYING FELTS TO GLASS POLISHING BLOCKS Aug. 18, 1931.

Filed April 26. 1930 3 Sheets-Sheet l lll A. E. EVANS APPARATUS FOR APPLYING FELTS T0 GLASS POLISHING BLOCKS Aug. 1s, 1931.

Filed April 26, 1930 5 Sheets-Sheet 2 INVENTOR A. E. EVANS Aug. 18, 1931.-

APFARATUSy FOR APFLYING FELTS TO GLASS POLISHING BT'JOCKS Filed April 26. 1930 3 Sheets-Sheet 5 INVENT'OR PatentedAug-1a1e31 "M 21,818,975,A

UNITED ASTATES. cfp'jFiICE-j ALBERT R. EvANsor PITTSBURGH, IRNNSYLVANIA,` AssIe'NoR To PITTSBURGH y PLATE eLAss coMrANY, A CORPORATION orv RnNNsYLvRNIA APPARATUS FOR PPLYING FELTs To 4cerneiss POLIsIIING BLooKs Application filed April 26,1930. SerialNo. 447,492.

'Fhe invention relates to apparatus for apspindle 2 of the runnerblooii Such rsfcess plymg the felt sheets employed in the polish= being opeIl'OIl 011 Side, as indicated .111 Flg- ,3 Ing of plate glass to the metal runner blocks. to permit the spindle to be moved to the posl- The, sheet of felt is ordinarily square and is tion shown in Fig. 1. The IeCeSS 110 iS -PIO- gf.; held in place on the annular block by means vided With the three bushings l1, 12 and 13, A55- cfa metal ring which encircles the periphery the bushing 12 being mounted I mOVemllt ofthe blockand clamps the corner portions O lOtaiOIl and being pI'OVidGd With 1 bandi@ of the felt to such periphery. Heretofore, 14 (Fig. 3). `After the spindle has been posithe operation of applying the felt has been tioned in` the bushings 11, 12 and 13, it is 1 redone by hand, the spindle of the block being locked in such position by the bushing 12 goil removed, the block turned upside down and which is rotated through an angle of about lald on a table, the felt applied, and the 90 degrees to close the open side of the recess, clamping ring positioned onV the felt and 10. i hammered down,so that it clamps'the corners Mounted for vertical` vmovement below the iaof the felt sheet between its inner surface and cross head 9 is a carrier 15 having a plunger ad@ the periphery of the block. y'1`heobject of the portion 16 `fitting into a cylinder y17 which is present'invention is to provide a. simple, conpartA of the casting 7 a bolted kto the base. 7. vement apparatus, kwhich can be employed The carrier is also guided. in its movements to apply the felt without removing the spin-A by means of a pair `of rod'sll'a which vare zal dleand with a minimum of labor, and which screwed into the carrier and extend through 70' 3 will apply the felt more accurately and. guide holes in the cylinder casting. Fluid smoothly than is ordinarily done bythe hand pressure is admitted to the cylinder .below operation. One embodiment of the invention the end of the plungerlG in order to move the! is illustrated in the accompanying drawings, carrier upward and perform the pressing kopigwher-ein: A eration,: as later described. Secured in. the 75'- Figure 1 is a vertical section through the lower end of the plunger centrally thereof is apparatus with the runner block icarried a post 18, uponwhich a sleeve 19 is mounted thereby in position to receive its polishing for relative vertical movement. The4 post is felt. Fig. 2 is a side lelevation of the apparaslotted, as indicated at 20, anda bolt 21 car- Y zetus. Fig. 3 isa partial plan view and partial 'A ried by, the lower end of the sleeve extends 150i4 section on the line III-III of Fig. 1. Fig. 4: through this slot. `A. spring 22 is locatedin is a section on the line V-IV of Fig. 3. vthe sleeve intermediate the upper end of the t vReferring to the drawings, 1 is a metal polpost 18 andthe cap 23 which isscrewed into lshing Vblock in the form of a disc provided the'upper end ofthey sleeve., -a

:5 "with a spindle 2, to which the felt sheet 3 of l The carrierl is provided withan annular 85 'f' rectangular cross section `isftofbe applied. shoulder 24 which carries the felt clamping The runner block isbrought to the position. ring 25. 4,The upperedge of thecarrier is 3 shown by means of the liftingtongs 4 whose provided with four 'projecting corners 26 y. ends are formed toengage the groove 5 at the (Fig. 3) and at'the edge of each of these cor-,

o ,i upper end ofthe spindle, the tongs being held ners'is apair of plates 27, 27 bolted in-.posi- *90]y 1n closed position by means of the clamping tion and projecting slightly above the upper Y ring 6 and being supported 'and moved about edge ofthe carrier, as indicated in Fig. 2. by means of a crane which is not shown. These corner members constitute a centering 1 The framework of the apparatus comprises means forthe felt 3 softhat when the felt,

e5 a base plate 7 4to whichv is secured a casting is laid on thetop of the Ycarrier with it'scor- 95 f 7 a, a pair of channels 8, 8 bolted to the ycasting ners fitting between the plates 27, 27 it is cen- 7a, and across head 9 secured by bolts or tered with respect tothe carrier and also with f other suitable means to-fthe upper ends of g respect. to ithef `runnerblock 1, to which the: the channels. The-cross4 head is provided felt 'is tobe applied. The `felt is thus sup-v 50 with anannular recess 10 for receivingqtheported at its corner portions bythe carrierV 100 i? shoulder 29 onthe runner bloc'l.

and at its central portion by the cap 23 which is yieldingly supported by the spring 22 in the position shown in Fig. l. The inner surface of the carrier just above the shoulder 24 which carries the ring 25 is preferably inclined, asindi'catedat28, to assist iii-centering the ring 25 when itis dropped into position and to provide clearance for the felt at its cornerportions.,whenlthe carrier. is moved.

up to press the.ring..25.over thefelt.`

In operation, the runner block 1 is positioned, as indicated-in Figgl with its upper surface against the lower end of the cross head 9, a felt sheet and theclainping ring are applied to the carrier l5 and fluid pressure is admittedto the` low-er; end ofi the plunger'- 16 toeause the Acar-rier tomove upward; The.

upward-movement.i of the `carrier. moves. the feltiupagainst thebottom surface of thevrunner block and a. further.v movement ofthe carrier', the ring. 251i`s .carried upwardpressiIig-thecorners ofthe-felt sheet up alongside theperi'phery ofthe .block 1,v this movement being continueduntil the; ring engagesv the During this clamping oper-ation, the cap 23. holds the center ofilthe felt sheet" againstv they lower side of the runner block, the spring 22 serving topermittheperiphery offthe carrier `to move up'l-"tol penfoiin its clamping functionafter the .cap 23 has. been. stoppediin. its upward movement; to--start'ingpositiom thuseompletingthe cycle.

'Ilheidev-ice is -easily Voperated an'dapplies. the

felt-'accurately andi smoothly.v without they necessity of removing. they spindle 2 froinc the. block as. has heretofore beenk customary1 Asishowln' anddescribed, the .crosshead 9 is.

Xedand fthe-carrier l51is movable, but'fit will l'be ui'iderstood'that theinv-ention contemplates aieversalasto:this condition as the carrier: may be Afixed and thecross` head imovable, all.

spindle liesin said recess-and the'face` of the bleek is heldagainst said? supporting surface, a'carrier below the cross head centered with respectV thereto,-means onthe v.carrier forsupperti'rigA a feltslieet.- to .be applied to said block; other -means ori-.the Icarri er .below the irsteme'afns foi supportinga. clamping ring and-means for cau-sing.- a. movement. of 'api-V The carrier: is;now inovedfdownpreach of the carrier with respect to the cross head to cause the felt sheet to engage the lower face of the block and to causethe clamping ring to move over the felt sheet into position surrounding the block.

2. Incombination in f apparatusfory applying a felt sheet to a runner blockv having a spindle,- a cross head having a supporting surface facing downwardly so asto engage the upper surface of arunner block and havii'ig a central' recess opening` laterally for reeeivingl the'spindle of thev runner block, means for engaging the upper end of the spindle audsupporting the block so that its spindle lies in said recess and the face of the bleek; is held against saidxsupporting-surface, acarrier below the cross headfcentered with-respect thereto,-means onthe carrier for. supporting at its edges a felt sheet to be applied to said block, other meansY which are spring pressed mounted on the carrier for supportingthe sheet atzits'ceiiter, means on` thecarrier below the sheet supporting means for-supportinga clampingV ring, andineansfor causing a movement of approach of the carrier withrespectto the cross: head to cause the feltsheet to engage the lower face of the block and to-eause the clamping. ring to move over the feltI sheet the block:

,3. In combination inapparatusfor applyinga. square felt1 sheet to a runner block, a.

cross head having a supporting surfacefacing downwardly, means for centering-the. runner bloclrbeneath.A said surface with its the corners of the felt sheet to centery it. with respecttothe carrier and said block, a'shoulderlying inside said flange below the upper into position surrounding..

edge thereof andiadapted-'to support aring d Y. for clamping. the .feltsheet, and means for causing; ainoveinent of approach of thecarrierf withrespect to the cross head to cause the felt` sheet to engage the lower face of the Y block and to .cause the clamping` ring to move over the-'felt' sheeti into `position surroundingthe block.

4; In combinationinapparatus for applyingral square felt sheet to alrunnerl block, aV

crosshead having aisuppoitingv surface facing downwardly7 means. for centering. the runner 'block beneath said surface with its upper faee'in oppositionto saidsurface, av

the corners .ofthe rfeltsheet to center` it withY respect to the carrier and Saidbl'Ock,Y other means. which are springl pressedy onthe-carrier for supportingthe felt sheetat rits-center, a shoulder lying inside said flange below the.

Y upper/edge thereof 'andf-adaptedto.supporta ring for clamping the felt sheet, and means for causing a movement of approach of the carrier with respect to the cross head to cause K the felt sheet to engage the lower face of the block and to cause the clamping ring to move over the felt sheetl into position surrounding the block. Y

5. In combination in apparatus for applying a square felt sheet to a runner block, a cross head having a supporting surface facing downwardly, means for centering the runner block beneath said surface with its upper face in opposition to said surface, a carrier below said cross head centered with respect thereto and having an annular flange provided with corner recesses for receiving the corners of the felt sheet to center it with respect to the carrier and said block, said fr flange having its inner wall tapering inwardly from its upper edge down, a shoulder carried by the flange below said tapered wall,

and adapted to support a ring for clamping the felt sheet, and means for causing a movement of approach of the carrier with respect to the cross head to cause the felt sheet to engage the lower face of the block and to vcause the clamping ring to move over the felt sheet into position surrounding the block.

6. In combination in apparatus for applying a felt sheet to a runner block having a spindle, a cross head having a supporting surface facing downwardly so as to engage the upper surface of a runner block and havin a central recess opening laterally for receiving the spindle of the runner block, means for engaging the upper end of the spindle and supporting the block so that its spindle lies in said recess and the face of the block is held against said supporting surface, a support below the cross head for the felt sheet and for a clamping ring centered with respect to the cross head, and power means for causing a movement of approach of the support with respect to the cross head.

7 In combination in apparatus for applying a felt sheet to a runner block having a spindle, a cross head having a supporting surface facing downwardly so as to engage the upper surface of a runner block and having a central recess opening laterally for receiving the spindle of the runner block, means for engaging the upper end of the spindle and supporting the block so that its spindle lies in said recess and the face of the f; block is held against said supporting surface,

means for pressing the spindle into said recess, a support below the cross head for the felt sheet and for a clamping ring centered with respect to the cross head, and power means for causing a movement of approach of the support with respect to the cross head.

In testimony whereof, I have hereunto subscribed my name this 12th day of March,

k.ALBERT E. EVANS. 

